Airtac SAILF Front Locking Pneumatic Cylinder SAILF63X50S
The AirTAC Airtac SAILF Front Locking Pneumatic Cylinder SAILF63X50S is a genuine double-acting ISO 15552 profile cylinder with a Ø63mm bore, 50mm stroke and a built-in spring-applied, air-released mechanical lock in the front cover — it holds the load at the extended (rod-out) stroke end even when air is lost.
- BoreØ63 mm
- Stroke50 mm
- Port sizeG3/8
- Lock positionFront cover
- Rod threadM16×1.5
- UnlockAir + manual
- No minimum order. A single piece can be ordered.
- Ready in 3–5 business days. That is the time we take to process the order and hand it to the carrier. Transit time after that depends on the destination.
About the Airtac SAILF Front Locking Pneumatic Cylinder SAILF63X50S
The AirTAC SAILF63X50-S is a double-acting ISO 15552 profile cylinder featuring a built-in mechanical lock in the front cover. A spring-applied, air-released mechanism engages when the piston reaches the extended stroke end, securely holding the load without requiring live air pressure. Delivering 1559N of push force at 0.5MPa, this carbon-rod cylinder is equipped with a magnetic piston for precise position detection using CMSE reed or DMSE solid-state sensors. PT tapered ports ensure tight pneumatic connections.
Because the lock occupies the front end, the variable air cushion on that side is notably shorter at 21mm compared to the 30mm cushion on the free end. This static holding brake engages only after the cylinder has stopped; it is not designed to clamp at arbitrary mid-stroke positions or act as a dynamic brake for a moving rod.
Airtac SAILF Front Locking Pneumatic Cylinder SAILF63X50S Technical Specifications
| Model | Airtac SAILF Front Locking Pneumatic Cylinder SAILF63X50S |
|---|---|
| Series | SAIL ISO 15552 cylinder with lock |
| Bore size | Ø63 mm |
| Stroke | 50 mm |
| Acting type | Double acting, with lock |
| Port size | G3/8 |
| Rod thread | M16×1.5 |
| Lock type | Spring-applied, air-released (front cover) |
|---|---|
| Unlock | Automatic (air) & manual |
| Operating pressure | 0.15 – 1.0 MPa |
| Temperature | -20 to +70 °C |
| Speed range | 30 – 800 mm/s |
| Cushion | Adjustable (30 mm free end / 21 mm lock end) |
| Max stroke | Up to 1500 mm |
Specifications follow the official AirTAC SAIL datasheet (ISO 15552). Confirm against the product label before installation. Port options: PT / G.
How the Lock Holds
The lock is spring-applied and air-released: a spring drives a lock pin into the rod when the release air is removed, so the load is held at the extended (rod-out) stroke end without live pressure. Supply air to the release port to unlock automatically, or use the manual release lever.
The lock engages only when the piston reaches the stroke terminal on the front-cover side — it is a static end-of-stroke hold, not a mid-stroke clamp and not a moving-rod brake. For locking at any position along the stroke, choose a BSAI clamp-lock instead.
Theoretical Output Force (Ø63mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 1559 N | 1402 N |
| 0.7 MPa | 2182 N | — |
| Max (@1.0 MPa) | 318 kgf | |
Cylinder thrust is separate from the lock's holding capability. Actual usable force is lower than theoretical due to friction and back-pressure — size with a margin.
Where the Airtac SAILF Front Locking Pneumatic Cylinder SAILF63X50S Is Used
Vertical Lift Safety
Holds a lifted load securely at the extended stroke end during a power loss, preventing sudden drops until air is resupplied to the release port.
Flow Stop Arm
Extends a stop gate to block items on a line and mechanically locks the barrier open, maintaining a physical block without continuous air consumption.
Safety Guard Hold
Keeps a machine guard extended and locked in place, ensuring the protective barrier remains rigid and secure during maintenance or idle periods.
Is the Airtac SAILF Front Locking Pneumatic Cylinder SAILF63X50S the Right Lock Cylinder?
Choose this 63mm bore model when an application requires 1559N of push force at 0.5MPa and a secure hold at the extended stroke end. If your system needs less force, the 50mm bore provides 982N; if more power is required, the 80mm bore yields 2513N. Select the SAILF configuration for extended-end holding, or switch to SAILB for retracted-end holding. If the mechanism must lock at any intermediate position along the stroke, select the BSAI clamp-lock cylinder instead.
For safe operation, avoid using fast-exhaust valves, as back-pressure on the locker side can inadvertently release the lock; always use an independent-exhaust solenoid valve. If human safety depends on the load remaining elevated, implement an additional independent safety measure. When replacing this unit, match the 63mm bore, 50mm stroke, front lock position, PT port threads, and the -S magnet specification.
Quick checklist
- ✓ Hold needed at the extended (rod-out) end?
- ✓ Or lock anywhere → use BSAI
- ✓ Independent-exhaust valve fitted
- ✓ Port/thread type (PT/G)
- ✓ Extra safety measure for people
Airtac SAILF Front Locking Pneumatic Cylinder SAILF63X50S FAQ
The 63mm bore provides 1559N of push force and 1402N of pull force at 0.5MPa. At 0.7MPa, the push force increases to 2182N.
The lock is spring-applied and air-released, engaging automatically when the piston reaches the extended stroke end. It holds the rod statically without live pressure. To unlock, supply air to the release port or use the manual release lever. It cannot lock at mid-stroke.
Related AirTAC Lock & Standard Cylinders
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